Dicentrine, (-)- is an aporphinic alkaloid found in several plant species, which showed significant antinociceptive activity in an acute model of visceral pain in mice.

4-Methyl-2-pentanone is an organic solvent. It is occasionally found as a volatile component of urine. It in urine is considered a biological marker of occupational exposure to this solvent.

12-Didecanoyl-sn-glycero-3-phosphocholi is a synthetic less hydrophobic phospholipid that has been found to be useful for enhancing the absorption of peptide drugs and hormones such as insulin.